Hot Water Recirculating Pump Power Requirements at a Glance#
A hot-water recirculating pump is one of the smallest loads in the house, running on 120 volts at just 1 to 2 amps through a 5-15R outlet on a 15-amp branch. An under-sink unit draws 25 to 120 watts and a timer-controlled version 40 to 150 watts — night-light territory either way.
Hot Water Recirculating Pump Electrical Specifications#
| Configuration | Voltage | Amps | Watts (max load) | Breaker | Outlet (NEMA) |
|---|---|---|---|---|---|
| Under-sink recirculation pump | 120 V | 1–2 A | 25–120 W | 15 A | 5-15R |
| Timer-controlled recirculation pump | 120 V | 1–2 A | 40–150 W | 15 A | 5-15R |
This tiny circulator keeps hot water waiting at a far-off faucet so nobody stands there running the tap while it warms up, and it draws about as little current as a night light. It plugs into an ordinary outlet under the sink or beside the water heater, switched by a timer or a demand button, and it is far too small to ever need a branch of its own.
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Circuit and Breaker Sizing for the Hot Water Recirculating Pump#
At 1 to 2 amps this little circulator is electrically invisible, so the standard 14-gauge wiring already serving the sink or the water heater carries it with room to spare. There is no case for a dedicated branch — the pump simply shares whatever nearby outlet is handy. Whether it is switched by a timer, a demand button, or an aquastat, the current never changes enough to matter to the breaker.
Installation and Safety Notes for Hot Water Recirculating Pump Wiring#
The pump ships with a standard 5-15R cord, so it plugs into an existing outlet under the sink or beside the water heater with no wiring work at all. Because it draws so little and connects with a plug, it rarely triggers a permit on its own. This is a comfortable homeowner project; the only reason to call an electrician is if there is no outlet where the pump has to sit and a new receptacle must be added.
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Hot Water Recirculating Pump Electrical FAQ#
Does a hot-water circulator need a dedicated circuit?#
No. Drawing only 1 to 2 amps, it shares an ordinary outlet and adds essentially nothing to that branch.
What breaker does the little pump sit on?#
It rides a standard 15-amp branch through a 5-15R outlet. Its 25 to 150-watt draw uses a tiny sliver of that capacity.
How little current does a recirculation pump draw?#
Just 1 to 2 amps — about the same as a night light. Even the timer-controlled version tops out around 150 watts.
Can it plug into an ordinary under-sink outlet?#
Yes. A standard 5-15R receptacle under the sink or by the water heater is all it needs, with no wiring changes.
Is the pump switched by a timer or a button?#
Either — many run on a timer, while demand-style units start from a button or sensor at the far faucet. The switching method does not change the tiny current.
Does it ever need a circuit of its own?#
No. At 1 to 2 amps there is never a reason to give it a dedicated branch; a shared outlet is always plenty.
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